SEGMENT INFORMATION (Tables)

12 Months Ended

Dec. 31, 2017

Segment Reporting [Abstract]

Segment Information

	Years ended December 31,
	2017			2016			2015
Sales:	($ in millions)
Chlor Alkali Products and Vinyls	$	3,500.8		$	2,999.3		$	1,713.4
Epoxy	2,086.4			1,822.0			429.6
Winchester	681.2			729.3			711.4
Total sales	$	6,268.4		$	5,550.6		$	2,854.4
Income (loss) before taxes:
Chlor Alkali Products and Vinyls	$	405.8		$	224.9		$	115.5
Epoxy	(11.8		)	15.4			(7.5		)
Winchester	72.4			120.9			115.6
Corporate/Other	(86.5		)	(55.8		)	(40.6		)
Restructuring charges	(37.6		)	(112.9		)	(2.7		)
Acquisition-related costs	(12.8		)	(48.8		)	(123.4		)
Other operating income	3.3			10.6			45.7
Interest expense	(217.4		)	(191.9		)	(97.0		)
Interest income	1.8			3.4			1.1
Income (loss) before taxes	$	117.2		$	(34.2	)	$	6.7
Earnings of non-consolidated affiliates:
Chlor Alkali Products and Vinyls	$	1.8		$	1.7		$	1.7
Depreciation and amortization expense:
Chlor Alkali Products and Vinyls	$	432.2		$	418.1		$	186.1
Epoxy	94.3			90.0			20.9
Winchester	19.5			18.5			17.4
Corporate/Other	12.9			6.9			4.5
Total depreciation and amortization expense	$	558.9		$	533.5		$	228.9
Capital spending:
Chlor Alkali Products and Vinyls	$	209.5		$	195.1		$	94.5
Epoxy	37.9			45.4			7.7
Winchester	22.5			19.5			25.6
Corporate/Other	24.4			18.0			3.1
Total capital spending	$	294.3		$	278.0		$	130.9

	December 31,
	2017		2016
Assets:	($ in millions)
Chlor Alkali Products and Vinyls	$	7,008.0	$	6,521.4
Epoxy	1,597.1		1,514.3
Winchester	425.2		424.0
Corporate/Other	188.0		302.9
Total assets	$	9,218.3	$	8,762.6
Investments—affiliated companies (at equity):
Chlor Alkali Products and Vinyls	$	28.5	$	26.7

Segment geographic data

	Years ended December 31,
Geographic Data	2017		2016		2015
Sales:	($ in millions)
United States	$	3,560.4	$	3,356.8	$	2,208.5
Foreign	2,708.0		2,193.8		645.9
Total sales	$	6,268.4	$	5,550.6	$	2,854.4

	December 31,
	2017		2016
Long-lived assets:	($ in millions)
United States	$	3,211.9	$	3,352.2
Foreign	363.9		352.7
Total long-lived assets	$	3,575.8	$	3,704.9